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26
SERVICE AND MAINTENANCE
Spark Plug Service
WARNING
DO NOT check for spark with spark plug removed. DO NOT crank engine with
spark plug removed.
To ensure proper engine operation, the spark plug must be properly gapped and
free of deposits.
1. Remove the spark plug boot and use a spark plug wrench to remove the
plug. See “Figure 12”.
WARNING
If the engine has been running, the muffler will be very hot. Be careful not
to touch the muffler.
Spark Plug
Spark Plug Boot
Figure 12
2. Visually inspect the spark plug. Discard the spark plug if there is apparent
wear, or if the insulator is cracked or chipped. Clean the spark plug with a
wire brush if it is to be reused.
3. Measure the plug gap with a feeler gauge. Correct as necessary by
bending side electrode. See “Figure 13”. The gap should be set to between
0.024-0.031 in.
Electrode
0.024-0.031 in.
Figure 13
4. Check that the spark plug washer is in good condition and thread the spark
plug in by hand to prevent cross-threading.
6. Attach the new air filter with foam element, aligning the hole in the air filter
with the intake manifold. See “Figure 10”. Secure with thumb screw.
Intake Manifold
Figure 10
7. Attach the air filter cover, making sure to align plastic rib features on the
shroud to the plastic features on the air filter cover. See “Figure 11”. Turn
thumb screws clockwise until snug. Check for any misalignment.
Plastic Rib
Feature
Shroud
Plastic
Feature
Air Filter
Cover
Figure 11
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